Hydraulic jack



FIG. 1 is a top and front perspective view of a hydraulic jack showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side elevational view thereof, the opposite side elevational view being a mirror image of that shown; and

FIG. 7 is a top perspective view thereof showing the jack in use.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a hydraulic jack, as shown and described. 